Company A sells a parcel of land to Company B in exchange for a note receivable. The terms of the note require Company B to make a single payment of $600,000 in two years. Using a 10% interest rate, the implied annual interest is $600,000 0.10 = $60,000, and the present value of the note is $600,000 0.82645 = $495,870. Which amount must Company A consider as the proceeds from the sale of the land in order to calculate gross profit or gain/loss on the sale in accordance with generally accepted accounting principles (GAAP)?